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RS-PHY910-4 and RS-PHY910-5 - Coggle Diagram
RS-PHY910-4 and RS-PHY910-5
Vectors and 2D Motion
What are vectors?
Vectors are ordinary numbers with are also known as scalars because they have a magnitude which tells you how big they are
Vectors don't only talk about two directions they talk about any
When drawing a vector it looks a lot like the hypotenuse of a right triangle
Unit Vector Notation
V (Vector)
J Represents the Y Axis
K Represents the Z Axis
I Represents the X Axis
Equations
Cos(X)=Adjacent/Hypotenuse
Tan(X)=Opposite/Adjacent
Sin(X)=Opposite/Hypotenuse
The Displacement Curve
X-X0 = V0 x T + 1/2 x A x T^2
Friction
Static Friction
Resistic Force
Normal Force
FN
Coefficient of Static Friction
mus
Mximum force of static friction equation
Fs,max = us (Fn)
Kinetic Friction
Resistic Force
The coefficient of Kinetic Friction
muk
Normal Force
FN
Fk=uk(Fn)
Fnet = m x g (sin(0)) - Fs, max
Newtonian Gravity
Distance
When an pbject is close to earths surface like an apple in a tree, gravity makes it accelerate at about 10 meters per second squared
Equation for how gravity behaves
Gravitational force is proportional to both masses multiplied together divided by the radius squared
Universal Gravitation
Fg=G x M x m/r^2
G = 6.67x(10-11N)xm^2/kg^2
acceleration = Universal Gravitational constant x bigger object mass divided by radius squared
This is equal to small g
Newtons Laws
Net Force is equal to mass times acceleration
Fn=m x a
As for every action there is an equal but opposite reaction
The Law of Inertia (if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.)
How to measure Inertia?
Net Force
The amount of force left over, once you have added together all the forces that might cancel each other out
Fnet=Ft - me x g
Equilibrium
The object can still be moving but its velocity won't be changing
Force of gravity
Fg=mg
Normal Force
Always perpendicular
F.B.D (Free Body Diagram)